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Design and Control of a Bidirectional Power Conversion System with 3-level T-type Inverter for Energy Storage Systems

  • Sung, Won-Yong (Department of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Ahn, Hyo Min (Department of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Oh, Chang-Yeol (Power Conversion & Control Research Center, HVDC Research Division, Korea Electrotechnology Research Institute (KERI)) ;
  • Lee, Byoung Kuk (Department of Electrical and Computer Engineering, Sungkyunkwan University)
  • 투고 : 2017.09.18
  • 심사 : 2017.10.20
  • 발행 : 2018.01.01

초록

In this paper, the design process and the control method of the power conversion system (PCS) that consists of a bidirectional DC-DC converter and a 3-level T-type inverter for an energy storage system is presented. Especially the design method of the output LCL filter for a 3-lvel T-type inverter without complex mathematical process are proposed. The validity of the control method and design process in this paper are verified through simulation and experimental analysis.

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Fig. 1. Configuration of PCS for ESS

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Fig. 2. Configuration of PCS controller

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Fig. 3. Line-to-line voltages of the 3-level T-type inverter

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Fig. 4. Phase voltages of the 3-level T-type inverter

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Fig. 5. Equivalent single-phase short circuit model in high-frequency band

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Fig. 6. Simulation results of PCS with designed LCL filter

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Fig. 7. Simulation results of LCL filter currents

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Fig. 8. 5kW prototype of the PCS with 3-level T-typeinverter and experimental environment

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Fig. 9. Experimental results of the 3-level T-type inverterin discharging mode

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Fig. 10. Experimental results of the 3-level T-type inverterin charging mode

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Fig. 11. Experimental results of the PCS

Table 1. Control targets of the PCS

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Table 2. Specification of the PCS

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Table 3. Design result of the LCL filter

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과제정보

연구 과제 주관 기관 : Korea Institute of Energy Technology Evaluation and Planning (KETEP)

참고문헌

  1. C. Y. Oh, "Design and Control of Energy Storage Systems based on 3-Level T-Type Inverters," Ph.D. dissertation, Dept. Elect. Comput. Eng., Sungkyunkwan Univ., Suwon, Korea, 2016.
  2. B. Ren, X. Sun, S. An, X. Cao, Q. Zhang "Analysis and Design of an LCL Filter for the Three-level Grid Connected Inverter," 2012 IEEE 7th Int. Power Electron. and Motion Cont. Conf., Harbin, China, pp. 317-318, Jun. 2012.
  3. P. Alemi, "Analysis and Control of Grid-Connected Three-Level T-type Converters," Ph.D dissertation, Dept. Elect. Eng., Yeungnam Univ., Gyeongsan, 2014.
  4. H. M. Ahn, C. Y. Oh, E. S. Jang, and B. K. Lee, "Design of Output Filter for Grid Connected 3-level T-type Inverter," 2016 Power Electronics Annual Conference, Buan, Korea, pp.317-318, Jul. 2016.
  5. T. C. Wang, Z. Ye, G. Sinha, and X. Yuan, "Output Filter Design for a Grid-interconnected Three-Phase Inverter," PESC 2003, Acapulco, Mexico, Jun. 2003.
  6. Q. Liu, L. Peng, Y. Kang, S. Tang, Deliang Wu, and Y. Qui, "A Novel Design and Optimization Method of an LCL Filter for a Shunt Active Power Filter," IEEE Trans. Ind. Electron., vol. 61, no. 8, pp. 4000-4010, Aug. 2014. https://doi.org/10.1109/TIE.2013.2282592
  7. P. Channegowda and V. John, "Filter Optimization for Grid Interactive Voltage Source Inverters," IEEE Trans. Ind. Electron., vol. 57, no. 12, pp. 4106-4114, Dec. 2010. https://doi.org/10.1109/TIE.2010.2042421
  8. H. M. Ahn, C. Y. Oh, W. Y. Sung, J. H. Ahn, and B.K. Lee, "Analysis and design of LCL filter with passive damping circuits for three-phase grid-connected inverters," J. Elect. Eng. Tech., vol. 12, no. 1, pp. 217-224, Jan. 2017. https://doi.org/10.5370/JEET.2017.12.1.217
  9. S. Lim, and J. Choi, "LCL Filter Design for Grid Connected NPC Type Three-Level Inverter," IJRER, vol. 5, no. 1, pp. 45-53, 2015.
  10. C. Xia, X. Gu, T. Shi and Y. Yan, "Neutral-point potential balancing of three-level inverters in directdriven wind energy conversion system," IEEE Trans. Energy Convers., vol. 26, no. 1, pp. 18-19, Mar. 2011. https://doi.org/10.1109/TEC.2010.2060487
  11. J. Shen, S. Schrüder, and R. Roesner, "A neutral point balancing controller for three-level inverter with full power-factor range and low distortion," In IEEE Energy Conversion Congr. and Expo., pp. 3419-3426, 2011.
  12. IEEE Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems, IEEE standard 519-192, 10, May 1992.